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Full-Complement Deep Groove Ball BearingsDeep Groove Ball Bearings

BL311

d 55 × D 120 × B 29 mm

The BL311 is a deep groove ball bearing with bore 55mm, outer diameter 120mm, and width 29mm rated for dynamic load 82.5 kN.

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BL311 — representative product photo
Representative product
BL311 · 55x120x29 mm

📋 Technical Specifications

Bore (d)
55mm
Outer Dia. (D)
120mm
Width (B)
29mm
Dynamic Load (Cr)
82.50 kN(82500 N)
Static Load (C0r)
61.50 kN(61500 N)
Reference Speed
5600rpm
Bearing typeDeep Groove Ball Bearings
SeriesFull-Complement Deep Groove Ball Bearings
Seal typeOpen
MaterialConfirmed per inquiry — grade and certificate availability reviewed before quotation
Bore typeConfirmed per drawing
Dimension unitmillimeter (mm)

🔐 Model Code Breakdown

What each part of BL311 means.

BL
Max Capacity
BLBL = maximum-type / full-complement bearing

📋 Nominal Variants by Seal Type

Catalog variants open a detail page. Inquiry-only configurations go directly to RFQ.

Seal TypeModel CodeTypical Use
Double metal shieldsBL311ZZGeneral dust protectionQuote →
Double contact rubber sealsBL311 2RS (inquiry only)Dust and moisture protection at moderate speedQuote →
Double non-contact rubber sealsBL311 2RZ (inquiry only)Lower-friction sealing at higher speedQuote →
C3 radial clearanceBL311 C3 (inquiry only)Motors and applications with higher operating temperatureQuote →

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)55
Outer diameter (D)120
Width (B)29

Corner radius, shoulder dimensions, fits and tolerances are confirmed against the requested suffix and application drawing before quotation.

📑 Drawings & 3D Model

BL311 bearing dimension drawing, 55 x 120 x 29 mm
BL311 dimension drawing: bore d 55 mm × outer diameter D 120 mm × width B 29 mm. Tolerance class ABEC-1 (P0). Internal design is shown schematically.
📑
2D Drawing (PDF)
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📐
2D DXF File
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📅
3D STEP Model
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The PDF drawing is free to download. DXF and 3D STEP files are sent on request: tell us the model and your application, and we reply with the CAD files.

⚡ Source-Data Reference Speed

Catalog reference
5,600 rpm

Lubrication method and application speed limit are confirmed per inquiry; no oil-speed value is derived from this number.

⇄ Same-size Bearings & Reference Options

The models below share the 55x120x29 mm boundary dimensions. Matching d/D/B alone does not prove interchangeability; verify seals, clearance, ring features, load ratings, fits, and application conditions before replacement.

ModelRelationshipSeriesSealAction
6311Same boundary dimensions — verify fit/load6300OpenQuote →
6311 2RSSame boundary dimensions — verify fit/load6300Rubber SealsQuote →
6311 2RZSame boundary dimensions — verify fit/load6300Rubber SealsQuote →
6311 ZZSame boundary dimensions — verify fit/load6300Metal ShieldsQuote →
6311NSame boundary dimensions — verify fit/load6300OpenQuote →
6311NRSame boundary dimensions — verify fit/load6300OpenQuote →
7311Same boundary dimensions — verify fit/load73 SeriesOpenQuote →
BL311ZZConfiguration variantFull-Complement Deep Groove Ball BearingsOpenQuote →

⚙ Typical Applications

Electric motors
Fans and blowers
Pumps
Household appliances
Power tools
Office equipment
General machinery

Why choose NLHB?

NLHB supports both in-house manufacturing and qualified partner sourcing. We confirm the specification, supply route, inspection requirements, and available documentation before quotation.

About NLHB →
4,300+
Models
15+
Years
RFQ
Specification Confirmed

❓ Frequently Asked Questions

What are the dimensions of BL311?
The BL311 bearing has bore (d) = 55 mm, outer diameter (D) = 120 mm, and width (B) = 29 mm.
Is there a BL311 drawing or CAD file?
Yes. The BL311 dimension drawing (PDF) is free to download on this page. DXF and 3D STEP files are sent on request: tell us the model and your application.
What is the load rating of BL311?
Dynamic load rating (Cr) = 82.50 kN (82500 N), static load rating (C0r) = 61.50 kN.
What tolerance class is the BL311?
The standard tolerance class of the BL311 is ABEC-1 (P0) per GB/T 307.1, unless otherwise agreed.
What bearing series does BL311 belong to?
The BL311 belongs to the Full-Complement Deep Groove Ball Bearings within the Deep Groove Ball Bearings category.
Can NLHB supply BL311 equivalents from other brands?
Depending on the model and order requirements, NLHB may manufacture in-house or source through qualified partner factories. Interchange and supply route are confirmed against your specification before quotation. All trademarks belong to their respective owners.
How do I order BL311 from NLHB?
Click "Request Quote" and send us your quantity, application, and required specifications. We review the specification, supply route, lead time, and pricing before issuing a quotation. Response time depends on specification complexity.
What materials are available for BL311?
Material grade is confirmed per inquiry. Availability depends on the model, quantity, application, and whether the order is manufactured in-house or sourced through a qualified partner factory. Material certificates or inspection documents are confirmed before quotation when required.

Get a quote for BL311

Send us your quantity, application and target lead time. We confirm spec, interchange and realistic delivery — no order confirmed until you approve.

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